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Proponents say that such controversial "human challenge" studies can speed up vaccine development. But others cite ethical concerns.

NPR's Steve Inskeep talks to Dr. Francis Collins, director of the National Institutes of Health, about the surge in U.S. coronavirus cases, and the progress on vaccines and mass testing.

Former Vice President Biden says tackling climate change is all about creating jobs. We examine his ambitious plans to make the U.S. economy carbon neutral and challenges he would face as president.

NPR's Steve Inskeep talks to David Wessel, director of the Hutchins Center at the Brookings Institution, about whether a new coronavirus relief bill can be passed before Election Day.

The high Court let stand a ruling in Pennsylvania that permits officials to count some mailed ballots up to three days after Election Day. And, the presidential debate will have uninterrupted time.

Highlights of political news leading up to Election Day. The Justice Department charges six Russian intelligence officers in connection with global computer hacks. And, a look into TikTok's dark side.

About 15 million properties in the U.S. are prone to flooding, but patchwork and ineffective disclosure laws mean most people get little to no information about flood risk before they move.

Ohio hit a new record of patients hospitalized with COVID-19 today, topping the high numbers of hospitalizations set in July.

Pennsylvania Republicans had sought to block the counting of late-arriving ballots, which the state's Supreme Court had approved last month.

The agency screened more than one million travelers at airport security checkpoints Sunday, the most since the start of the pandemic. But the modest air travel increase may be short-lived.